NSString Addition "MR_sortKeys" (and the corresponding define) allows to use it in other contexts.
Shorthand method for getting the numberOfRows of a NSFetchedResultController section without having to do the NSFetchedResultsSectionInfo Samba.
Is this the way we should create ShortHands? Unsure — Where would that be documented?
Fixing a double @interface block
Throwing an exception when the developer forgot to pass a non nil attribute to the method.
When an entity has a super entity, if no 'primaryAttribute' is found, going upwards the hierarchy looking for one.
MR_lookupkey will now look in the superentity if the "supposed" primary key doesn't exist.